My father is a doctor.

She bought a new bra.

My stepfather is a very kind person.

That was a certain result.

That result was certain.

His collection of essays is very interesting.

There is a necessity for his participation in the success of this project.

My niece is very smart.

My grandmother's forty-ninth day is next week.

In the old days, people used to consider milk as an important source of nutrition.